Expected Result: The checkbox is not changing its state
Actual Result: The checkbox is changing its state

Reproduced with: 2017.4.37f1, 2018.4.17f1, 2019.3.2f1, 2020.1.0a23

Resolution Note:

This is by design. Mouse pass-through was a request from the UX team to reduce clicking and was fixed at the same time as other pop-up window issues were fixed. This also aligned behaviors on the 3 supported OSes.